Spatial Distribution of Earthquake Epicenters of Northeastern Segment of Amur Microplate in Different Phases of the Earth's Rotation
Abstract
The results of modeling of spatial distribution of earthquakes in northeastern segment of the Amur microplate in various magnitude intervals in the range of 1200Е to 1400Е are presented. The seismicity dynamics in the different phases of change of the Earth's rotation speed is established. It is suggested to group the seismic events on the time of their occurrence in two phases of change of speed of the Earth rotation of «deceleration-acceleration». It is shown that the earthquake within the magnitudes interval from M=5 to M=6, united by phases of seismic activity in the annual cycle, are grouped into clusters, which regularly alternate in the space of an average of (3.5–40). For the earthquakes in the magnitude range from M=2 to M=4 three lineaments are distinguished which spatially combine fault systems of the Stanovoy Ridge and the Tan-Lu fracture zones of different kinematics and azimuths stretch. A supposition is made about the collective fault activation on a background of random seismicity process.
About the Authors
Sergei Vladimirovich Trofimenko
Institute of Tectonics and Geophysics FEB RAS
Russian Federation
Russian Federation
Viktor Gennadievich Bykov
Institute of Tectonics and Geophysics FEB RAS
Russian Federation
Russian Federation
Igor Innokent'evich Kolodeznikov
Academy of Sciences of the Republic of Sakha (Yakutia)
Russian Federation
Russian Federation
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Review
For citations:
Trofimenko S.V., Bykov V.G., Kolodeznikov I.I. Spatial Distribution of Earthquake Epicenters of Northeastern Segment of Amur Microplate in Different Phases of the Earth's Rotation. Arctic and Subarctic Natural Resources. 2015;20(4):41-44. (In Russ.)
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